摘要
根据反应谱计算理论得到了线性单自由度体系在地震作用下的输入能量谱、阻尼耗能谱、滞回耗能谱以及动能谱计算公式,通过数值计算得到了4种不同类别场地土条件下160条强震记录的输入能量谱,研究了输入能量谱的特点。研究结果表明,能量谱曲线可以分为3段,即短周期的上升段、中等周期的平台段和长周期的下降段。场地类别对能量谱平台段有一定的影响。最后,提出了描述输入能量谱的谱形状的3段式曲线方程,回归得到了输入能量谱的简化计算公式,验证了简化计算公式的合理性。
According to the spectrum analysis theory,the energy spectrum formulas were developed,which could be used to compute input energy spectrum,damping energy spectrum,hysteric energy spectrum and kinetic energy spectrum of elastic SDOF systems under earthquakes.Input energy spectrum were obtained for 160 records of strong earthquakes in four site conditions.The input energy spectrum curve is composed of three sections: the increase section for short periods,the plateau section for medium periods and the decrease section for long periods.Among them,the plateau section is affected by the site condition.Simplified formulas are proposed to describe the variation of spectrum curves,and whose rationality is verified.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2009年第S1期129-133,共5页
Journal of Building Structures
基金
国家自然科学基金重大研究计划培育项目资助(90715009)
